An Otto cycle with the air-standard assumptions (cv=0.717 kJ/kg.K and cp/cv=1.4) has a compression ratio of 10. Before the isentropic compression process, the air is at 140 kPa, 15°C, and 590 cm3. The heat transfer to the air per cycle is 1200 kJ/kg. The angular speed of the crankshaft for the four-stroke engine is 2400 revolutions per minute. Determine (a) the thermal (first law) efficiency, (b) the second law efficiency, (c) the net specific power output of the cycle (in kJ/kg) (d) the mean effective pressure (MEP), (e) the horse power (hp) of the engine Note: You must draw P-V and T-s charts and mark processes to have a score
An Otto cycle with the air-standard assumptions (cv=0.717 kJ/kg.K and cp/cv=1.4) has a compression ratio of 10. Before the isentropic compression process, the air is at 140 kPa, 15°C, and 590 cm3. The heat transfer to the air per cycle is 1200 kJ/kg. The angular speed of the crankshaft for the four-stroke engine is 2400 revolutions per minute. Determine (a) the thermal (first law) efficiency, (b) the second law efficiency, (c) the net specific power output of the cycle (in kJ/kg) (d) the mean effective pressure (MEP), (e) the horse power (hp) of the engine Note: You must draw P-V and T-s charts and mark processes to have a score
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An Otto cycle with the air-standard assumptions (cv=0.717 kJ/kg.K and cp/cv=1.4) has a compression ratio of 10. Before the isentropic compression process, the air is at 140 kPa, 15°C, and 590 cm3. The heat transfer to the air per cycle is 1200 kJ/kg. The angular speed of the crankshaft for the four-stroke engine is 2400 revolutions per minute. Determine
(a) the thermal (first law) efficiency,
(b) the second law efficiency,
(c) the net specific power output of the cycle (in kJ/kg)
(d) the mean effective pressure (MEP),
(e) the horse power (hp) of the engine
Note: You must draw P-V and T-s charts and mark processes to have a score
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